I'm taking as my starting point the marriage certificate of Eleanor & Henry:

25th Nov 1909:
Henry Kermode, 39, bachelor, Mariner, Port St Mary, father William Kermode, Mariner,
married
Eleanor Cavendish, 36, spinster, ----, Port St Mary, father Thomas Cavendish, Gardener
at The Parish Church, Rushen, IOM

1881 Census for Henry
13 Lime St, Port St Mary
William Kermode H m 47 Mariner Port St Mary
Isabella “ w m 44 “
Martha “ d 13 Scholar “
Henry “ s 11 Scholar “
Edward s 8 “ “
Alfred s 4 “ “

IGI: HENRY KERMODE C: 15 APR 1870 Kirk Rushen, Isle Of Man
Father: WILLIAM KERMODE Mother: ISABELLA CAREN

1891 Census for Eleanor
RG12/4689 f11 p19 sch127 6 Chester Street, Douglas
Thomas Cavendish H m 44 Potato Dealer, employer Michael
Jane w m 45 Port St Mary
Eleanor d 18 Douglas
Thomas s 14 “
Edith d 13 “
Alice d 11 “
William s 9 “
James s 7 “
Joseph s 5 “
Jane d 2 “
Alfred s 3mo “
I'm not even totally sure the burial details I've quoted are for the right people, but I'm really trying to find out about their children, by whatever route I - or anyone else? - can think of.